Mount Prospect, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

854
FXUS63 KLOT 120723
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
223 AM CDT Fri Jun 12 2026

.KEY MESSAGES...

- Scattered thunderstorms, possibly severe Saturday afternoon
  into Saturday evening.

- Cooler temps early next week with precip chances midweek.

&&

.DISCUSSION...
Issued at 223 AM CDT Fri Jun 12 2026

Dry, cooler and breezy conditions are expected today with
westerly winds gusting into the 25 mph range from late morning
through sunset as highs top out in the lower 80s.

A cold front will move across the northern Plains and upper
midwest tonight and then move across the local area Saturday
night as low pressure lifts northeast from the southern Plains
tonight to central IL Saturday evening. This will allow for
scattered thunderstorms to develop, possibly during Saturday
afternoon and especially into Saturday evening. While the
highest potential for severe storms will be near the track of
the surface low, across KS and into south/central IL, still
enough uncertainty that trends will need to be monitored for
possible severe thunderstorms across the local area, especially
the southwest cwa. There are also some timing differences with
thunderstorms potentially lingering into early Sunday morning
across the southeast cwa. The cold front is expected to move
south of the area Sunday morning with dry and cooler temps again
Sunday as highs may only reach the lower/mid 70s.

Models show a weaker upper trough moving across the Great Lakes
region in the Tuesday time frame possibly bringing a chance of
showers and thunderstorms and then a strong upper trough moving
across the region Wednesday/Wednesday night along with a surface
cold front bringing a better chance for showers and
thunderstorms. Depending on timing and precip coverage, temps
could increase well into the 80s on Wednesday and then cooler
temps for Thursday. cms

&&

.AVIATION /06Z TAFS THROUGH 12Z SATURDAY/...
Issued at 1224 AM CDT Fri Jun 12 2026

Primary forecast concern this period is gusty westerly winds
later this morning through sunset this evening.

Westerly winds will continue through sunset with speeds expected
to diminish under 10kt early this morning and then increase
again after sunrise with gusts into the lower/mid 20kt range
from late morning through sunset. Winds will turn more to the
southwest this evening with speeds diminishing under 10kt.

Some few/sct mvfr level clouds are possible early this morning
along with some cu later this afternoon and then some mid level
clouds Friday night into Saturday morning. cms

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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